Sericite is the name given to very fine, ragged grains and aggregates of white (colourless) micas, typically made of muscovite, illite, or paragonite....

achieves a preferred orientation. It is primarily composed of quartz, sericite mica, and chlorite. Phyllite has fine-grained mica flakes, whereas slate...

rocks. Phyllic alteration is characterised by the assemblage of quartz + sericite + pyrite, and occurs at high temperatures and moderately acidic (low pH)...

country rock. Plagioclase feldspar within the rock is converted to sericite (sericite is not a mineral; it is a term that is used to describe any fine-grained...

+/- sericite +/- silica. Often the host rock is entirely replaced by chlorite, which may appear as a chlorite schist in deformed examples. Sericite zone...

and chlorite-biotite phyllite intercalated with minor amounts of biotite-sericite-quartz schist. Between 7,000 and 7,600 m (23,000 and 24,900 ft), the lower...

for Al in the Y site and a corresponding increase in Si in the Z site. Sericite is the name given to very fine, ragged grains and aggregates of white (colourless)...

in weathering and hydrothermal environments; it may be a component of sericite. It is common in sediments, soils, and argillaceous sedimentary rocks as...

clay minerals. Chlorite is found in pelites along with quartz, albite, sericite, and garnet, and is also found in associate with actinolite and epidote...

selvages. Quartz-sericite-pyrite alteration, in which these minerals can be deposited both in veins and in a disseminated manner; sericite in particular...

The underlying Génis sericite schist is very rich in the minerals quartz, chlorite and muscovite (variety sericite). The sericite schist is probably of...

continuous and do not "pinch and swell." Alters to Commonly alters to sericite or clay. Relief Low negative relief Optical sign Biaxial negative Color...

rocks, which are about 2 km (6,600 ft) thick, consist of Upper Proterozoic sericite and chlorite slate and schist that contain minor amounts of metavolcanic...

Rain, snow, wind, frost and heat gradually eroded the mountains. Solid sericite-quartzite schists, from which the remains are composed, were eroded less...

is a microscopic mixture of several other minerals, zoisite, epidote, sericite, albite or other sodium-rich feldspar along with possibly scapolite. The...

about 1,000 to 2,000 feet thick on Greylock and "consists of muscovite (sericite), chlorite, and quartz schist." It lies above a formation called "Bellows...

modern exploration data demonstrate commercial gold presence in quartz-sericite-chlorite and quartz-alunite rocks in close vicinity to the hydrothermal...

typically have an outer epidote – chlorite mineral alteration zone. A quartz – sericite alteration zone typically occurs closer to the center and may overprint...

gridiron twinning. Distinguishable from sanidine by a larger 2Vx. Other characteristics Low negative relief; alters to sericite or clay (commonly) References...

developed with metasomatic replacement of primary minerals by carbonate, sericite, albite and quartz. Currently 25 deposits have been identified and explored...

(pottery stone), dunite. Carbonates – dolomite, limestone. Clays – kaolinite, sericite, bentonite, fuller's earth. Soft and heat insulating stone – pyrophyllite...

Alteration is nonexistent to very weak at best, and the weak chlorite and sericite are believed to be mainly post-ore effects. Other post-depositional alteration...

copper-producing state. The ore was chalcopyrite with pyrite and pyrrhotite in sericite schist host rock. The Elizabeth deposit was discovered in 1793 and started...

The geological make up of the river is schistose quartz-porphyrite and sericite schist, and quartz boulders making up any major river obstruction. The...

results in the formation of abundant secondary minerals such as kaolinite, sericite, serpentine, montmorillonite, and chlorite and a corresponding increase...

exposures of Late Proterozoic schistose, quartzose sandstones and phyllitic, sericite-quartz schist (turbidites) also occur in the southeastern part of Bolshoy...

squared for lintels. The greenschist, whose colour comes from chlorite and sericite, are used mainly for roofing in Nord-Cotentin, but also masonry in Cherbourg...

narrow zone of weakly metamorphic rocks such as phyllites, greenschists and sericite gneisses.[5] They are appear greenish through chlorite and epidote. The...

quartzite-phyllites, and sericite schist, which show a continuous transition from basaltic lavas tuff to the chlorite and sericites schist. In Bagrote valley...

contain disseminated galena, sphalerite and sulfosalts within phyllic (sericite–pyrite–quartz) and proplytic (chlorite–epidote–pyrite) hydrothermal alteration...